Over the past few months, we have received many questions and feedback from developers in regards to identifying cards and media.1, 2, 3, 4 To help clarify this, we have written two guides to help developers navigate and understand how to effectively work with cards and media.

These guides describe identifiers, where to find references to each, and how to retrieve these entities in various resources. In addition, the Identifying Media guide includes information about the Media Library.